表达 “sadder but wiser” 用来谈论 “从一个非常痛苦或悲伤的经历中学到一些东西”，就是所谓的 “经一事，长一智”。

例句
We had a bad time in our relationship, but we got through it sadder but wiser. We will never argue about money again.
我们的关系经历过低谷，但经一事，长一智。我们不会再为了钱财而争执了。

After that argument, I was sadder but wiser. Some people will never change.
自从那次争论之后，我算是经一事，长一智。我明白了有些人就是本性难移。

After the economic downturn, we were left sadder but wiser. There will now be rules to stop banking malpractices in the future.
在经历了经济低迷之后，我们吃一堑，长一智。现在将有规章制度防止银行业的不法行为再次出现。